GB/T 42193.6-2026Road vehicles - Communication between vehicle and external equipment for emissions-related diagnostics - Part 6: Diagnostic trouble code definitions (English PDF)
道路车辆 车辆和外部设备之间排放相关诊断的通信 第6部分：诊断故障码定义
Also coversGB/T42193.6-2026 + GBT42193.6-2026
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
September 28, 2026
Implementation date
April 1, 2027
Scope
GB/T 42193.6-2026 is the English-translated version of 道路车辆 车辆和外部设备之间排放相关诊断的通信 第6部分：诊断故障码定义.
Part 6 of this series on road vehicles addresses diagnostic trouble code definitions within the communication between a vehicle and external equipment for emissions-related diagnostics. These codes are the standard labels through which an on-board system reports faults to a scan tool or inspection device. The standard adopts an international standard.
Vehicle manufacturers, engine and electronics suppliers, diagnostic tool makers, emissions inspection operators and regulators work with such definitions when designing and checking diagnostic software. A shared code list lets a tool read the same fault in the same way across different makes and models.
It is a recommended national standard (GB/T) issued under the Ministry of Industry and Information Technology, and it forms one part of a multi-part series, so it should be read together with the other parts that define the communication framework. Manufacturers exporting vehicles to China, or tool suppliers serving the Chinese aftermarket, can use it to align diagnostic implementations.
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Document preview — GB/T 42193.6-2026
National Standard of the People's Republic of China
- ICS
- 43.040.10
- Classification
- T35
Issued by: State Administration for Market Regulation; Standardization Administration of China
Contents
- Foreword
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
Foreword
GB/T 42193.6-2026 is a recommended national standard (GB/T) of the People's Republic of China, issued on 28 September 2026 by the State Administration for Market Regulation and the Standardization Administration of China, with effect from 1 April 2027.
The document adopts an international standard (ISO or IEC).
It is under the responsibility of the Ministry of Industry and Information Technology.
Classification: ICS 43.040.10; CCS T35.
1 Scope
Part 6 of this series on road vehicles addresses diagnostic trouble code definitions within the communication between a vehicle and external equipment for emissions-related diagnostics. These codes are the standard labels through which an on-board system reports faults to a scan tool or inspection device. The standard adopts an international standard.
Vehicle manufacturers, engine and electronics suppliers, diagnostic tool makers, emissions inspection operators and regulators work with such definitions when designing and checking diagnostic software. A shared code list lets a tool read the same fault in the same way across different makes and models.
It is a recommended national standard (GB/T) issued under the Ministry of Industry and Information Technology, and it forms one part of a multi-part series, so it should be read together with the other parts that define the communication framework. Manufacturers exporting vehicles to China, or tool suppliers serving the Chinese aftermarket, can use it to align diagnostic implementations.
Remaining clauses in the full document
- 2 Normative references
- 3 Terms and definitions
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 25 pages — is available in the English PDF.
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Related Standards
GB/T 42193.1-2022 — Road vehicles - Communication between vehicle and external equipment for emissions-related diagnostics - Part 1: General information and use case definition
GB/T 42193.3-2022 — Road vehicles - Communication between vehicle and external equipment for emissions-related diagnostics - Part 3: Diagnostic connector and related electrical circuits: Specification and use
GB/T 42193.4-2022 — Road vehicles - Communication between vehicle and external equipment for emissions-related diagnostics - Part 4: External test equipment
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